.doc{
  width: 100%;
  padding: 20px 0;
}

.doc-container{
  max-width: 1200px;
  margin: 0 auto;
}

.doc-main-area{
  width: 100%;
  display: flex;
  align-items: flex-start;
}

.doc-catalog{
  width: 300px;
  box-sizing: border-box;
  border: 1px solid #e1e4e5;
  border-radius: 5px;
  padding: 20px;
  margin-right: 20px;
  font-size: 14px;
  position: sticky;
  top: 80px;
  max-height: 820px;
  overflow-y: auto;
}

.doc-catalog li{
  white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-catalog li.first-catalog{
  font-size: 16px;
}

.doc-catalog li.valid-catalog{
  cursor: pointer;
}

.doc-catalog li.valid-catalog:hover{
  color: #378bf7;
}

.doc-catalog li.current{
  color: #378bf7;
}

.doc-catalog li.first-catalog label{
  margin-right: 6px;
}

.doc-catalog li.second-catalog{
  margin-top: 10px;
  text-indent: 2em;
}

.doc-catalog li.second-catalog label{
  margin-right: 6px;
}

.doc-catalog li.second-catalog+li.first-catalog{
  margin-top: 10px;
}

.doc-content{
  flex:1;
}

.doc-content>.doc-content-item:not(:nth-child(2)){
  display: none;
}

.doc-content-item{
  width: 100%;
  padding: 20px;
  box-sizing: border-box;
  border:1px solid #e1e4e5;
  border-radius:5px;
  min-height:700px
}

.doc-content-item h2{
  font-size: 30px;
  line-height: 55px;
  margin-bottom: 10px;
}

.doc-content-txt{
  border-top:1px solid #e1e4e5;
  padding-top: 10px;
}

.doc-content-txt h3{
  font-size: 16px;
  margin-top: 16px;
  font-weight: 600;
}

.doc-content-txt h4{
  font-size: 14px;
  margin-top: 16px;
  font-weight: 600;
}

.doc-content-txt p{
  text-indent: 2em;
  font-size: 15px;
  line-height: 28px;
  margin-top: 10px;
}

.doc-content-txt img{
  max-width: 700px;
  margin-left: 20px;
  margin-top: 15px;
}

.test{
  display: flex;
}

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid black;
}

.table thead{
  background-color: #D0D0D0;
}

.table th {
  border-collapse: collapse;
  border: 1px solid black;
  padding: 5px 20px;
  font-size: 16px;
  vertical-align: middle;
  line-height: 26px;
}

.table td {
  border-collapse: collapse;
  border: 1px solid black;
  padding: 5px 20px;
  font-size: 14px;
  color: #333;
  vertical-align: middle;
  line-height: 26px;
}

.table-div {
  width: 90%;
  border-collapse: collapse;
  border: 1px solid black;
  margin:0 auto;
}

.table-div thead{
  background-color: #D0D0D0;
}

.table-div th {
  border-collapse: collapse;
  border: 1px solid black;
  padding: 5px;
  font-size: 16px;
  vertical-align: middle;
  text-align: center;
  line-height: 26px;
}

.table-div td {
  border-collapse: collapse;
  border: 1px solid black;
  padding: 5px 20px;
  font-size: 14px;
  color: #333;
  vertical-align: top;
  text-align: center;
  line-height: 26px;
}

